First, type !mwcal in the Chat. Make sure that you are a GM in the Game, otherwise the displayed Menu won't have any Buttons. Next, you can click on any of the various Categories, which will make several Prompts show up, where you can further customize the Calendar.

Calendar Menu

Top Buttons

The Buttons on the top, next to Day, Month, Year, Time and Moon let you edit the Value written within them.

Bottom Buttons

The Buttons at the bottom have various functions, described by the Label on the Button.

Advance Time

This will first ask for a Number. Make sure you don't input a negative or decimal number in here. Afterward, it will ask for a Selection between Short Rest, Long Rest, Minute, Hour, Day, Month, or Year.

The time will then be advanced based on the selection you made and the Number you inserted.

Toggle Weather Display

This toggles the point Weather: at the top. If you toggle it off, it will no longer be displayed and the Button Randomize Weather will disappear.

Toggle Moon Display

This does the same as Toggle Weather Display but with point Moon: and the Button Randomize Moon Phase.

Randomize Weather

This will randomize the weather and change the text written next to Weather:.

Randomize Moon Phase

This will reset the Moon Phases to be dependent on Day and Month.

Open Alarm Menu

This will open the Alarm Menu that will be covered further down.

Show to Players

This will show the current Calendar to the Players. (see below for an example)

Reset Calendar

This will reset the Calendar to its base values. Only use this if you're experiencing issues with the Display.

Alarm Menu

The base Alarm Menu can be displayed by pressing Open Alarm Menu in the Calendar Menu.

Create Alarm

This will first ask for a Title, then for a Date, a Time as well as a Message. The Date needs to be in the format DD.MM.YYYY and the Time needs to be in the 24-hour format HH:MM.

Upon completion, a chat notification will appear, letting you know that the Alarm has been created.

The Alarm will be triggered ONCE as soon as the Calendar reaches or passes the configured Time/Date. Afterward, the Alarm will be automatically deleted.

Open Calendar

This will open the Calendar Menu.